Android Question Sharing files from your app with File Provider

Sub SetWallpaperIntent
    Private sharedFolder As String
    sharedFolder = Starter.rp.GetSafeDirDefaultExternal("shared")

    'copy the file to the shared folder
    File.Copy(File.DirRootExternal&"/WallDrox/Wallpapers/", "wall1.png" , sharedFolder , "wall1.png")
    'The intent
    Dim i As Intent
    i.Initialize("android.intent.action.ATTACH_DATA", CreateFileProviderUri(sharedFolder, "wall1.png"))
    i.SetType("image/*")
    i.Flags = 1
    Try
        StartActivity(i)
    Catch
        ShowSnackBar("Error setting Wallpaper", 0)       
        Log(LastException)
    End Try
End Sub
Sub CreateFileProviderUri (Dir As String, FileName As String) As Object
    Dim FileProvider As JavaObject
    Dim context As JavaObject
    context.InitializeContext
    FileProvider.InitializeStatic("android.support.v4.content.FileProvider")
    Dim f As JavaObject
    f.InitializeNewInstance("java.io.File", Array(Dir, FileName))
    Return FileProvider.RunMethod("getUriForFile", Array(context, Application.PackageName & ".provider", f))
End Sub